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A dorsal slit (often referred to in anthropology as superincision) is a single incision along the upper length of the foreskin from the tip to the corona, exposing the glans without removing any tissue. An ancient practice, it has been a traditional custom among a number of peoples, particularly Filipinos and Pacific Islanders, probably for thousands of years. In Western medicine it was used as an alternative to circumcision to relieve conditions such as failure of the foreskin to retract (phimosis) or failure to cover the glans penis (paraphimosis), although a perception of poor appearance limited its popularity. While it is a less invasive surgery than circumcision, it is more invasive than preputioplasty since it leaves the incision open. It is still used when circumcision or other measures are considered impractical or undesirable. ==Traditional custom== Since superincision and circumcision are both forms of genital cutting that expose the glans, it can often be difficult to know which procedure is being described or depicted. Opinion is divided on whether a 4,000-year-old image from Egypt, often described as the first depiction of circumcision, may in fact be of a superincision.〔Tasmania Law Reform Institute (''Non-Therapeutic Male Circumcision'' ) Issues Paper, No. 14, 2009. (p. 14)〕 Superincision has been widely practised by people of the Pacific, stretching from Hawaii〔 Milton Diamond incorrectly terms the procedure subincision, though it is clear superincision is meant.〕 to the Philippines.〔Boyle, G and Ramos, S (2000). (''Ritual and Medical Circumcision among Filipino boys: Evidence of Post-traumatic Stress Disorder'' ), Humanities & Social Sciences papers, Bond University (p. 5)〕 However, with increasing urbanisation, traditional rituals have been giving way in many places to medically performed circumcision, and almost entirely so among Islanders living in New Zealand, where a recent survey found there was "a strong cultural demand from parents". The most notable exception to Pacific superincision is the Māori of New Zealand, who do not circumcise or superincise,〔(Circumcision and Māori ) by Valentino Križanić〕 although they have an indigenous term for the latter (''ure haea'' or "split penis") and their tradition is that they stopped the practice when they arrived in New Zealand. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「dorsal slit」の詳細全文を読む スポンサード リンク
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